Coffee machine



FIG. 1 is a front left perspective view of a coffee machine showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

A back view of coffee machine is omitted as the back is flat and unornamented. 

The ornamental design for coffee machine, as shown and described. 